Could be the Ballast is giving up the ghost.  Try a new bulb and see if it
solves the problem.  If not, time for a whole new unit, as the ballast
assembly, while still available is almost as much as the whole assembly.  My
boss recently had the same problem with his 90 Multivan Poptop and what I've
described is what we did - replaced it.

As a side note, I happen to have about 1/2 a dozen new, never
installed Fluorescent Light Assemblies I picked up recently in a parts buy.
I get $45 + Priority Mail (about $11).

I also have replacement Lenses and the Plastic Cover that goes over the
wiring on the one end of the light.  If anyone's interested, please pmail me
for estimates.
--
Jim Thompson
84 GL 1.9 "Gloria"
84 Westfalia 2.1 "Ole Putt"
73 K Ghia Coupe "Denise"
72 411 Station Wagon "Pug"
oldvolkshome@gmail.com
http://www.oldvolkshome.com
***********************************
On Dec 26, 2007 5:38 PM, Edward Maglott <emaglott@buncombe.main.nc.us>
wrote:

> My light seems to be on the blink, so to speak.  I replaced the bulb
> a year or so ago.  Now it acts like it is trying to come on, but
> doesn't.  The ends glow, but it doesn't come on.  Is there a way to
> test the output of the fixture or the bulb with my multimeter?  Or
> should I just spring for a new bulb to try in it?
>
> Edward